Best idea I've got so far is to save all my notes as individual ideas in a database, tagged, then use them for deliberate lateral thinking - randomizing - reflecting. But also searching for themes when needed.
Not the OP but chiming in to ask this as well. I've read a few books of your list, and I'm interested in how you organise all the knowledge acquired from books and apply them to your life. It's easy to forget, lose focus and get lost.
